Hi Vanessa,
Worrying, that breathing problem - I'm wondering when you were last checked out for things other than RSD...sometimes the RSD can be so overwhelming that it masks other things that might be going wrong. Many of us, sad to say, have other conditions coexisting with RSD, and some of the conditions overlap as far as symptoms go... perhaps you should ask the doc to check you out next time you're there, just in case.
But, btw, I agree with Di that when PT starts to present its own problems, the time has come to ease up; she's right, not all PT is good for RSD - I'm not saying they're getting it wrong, at all - just that the body can only cope with so much, and you've gotta give the brain a chance to cope too.
You're a real trooper, though, I take my hat off to you - and I love your enthusiasm - sometimes, though, we need to stand back, take a breather and rethink a little. Maybe time for a small pause - in general, I mean, not just the PT?
Just a thought, do take care, we love having you here,
all the best